Repiping a house is one of the biggest plumbing investments a homeowner makes, and it comes with a lot of questions — what it actually involves, what it costs, which pipe material to choose, and whether it’s worth doing at all. Here’s everything we get asked most often about whole-house repiping.
What Is Repiping?
Repiping is the process of removing a home’s existing water supply pipes — and often the drain lines too — and replacing them with new ones. It’s typically done when the existing pipes are corroded, leaking, or causing low water pressure, usually because they’re old galvanized steel or aging copper. The old pipes are removed and new ones installed in their place, which can involve cutting into walls and floors, though an experienced plumber works to minimize disruption. Done well, it resolves water quality and pressure issues at the source rather than patching symptoms one leak at a time.
Signs You Need to Repipe
The clearest signs are decreasing water pressure, discolored water, and leaks that keep happening in different spots rather than one isolated failure. If your home still has galvanized pipes — common in houses built before the 1960s — that alone is a strong reason to consider repiping, since galvanized steel is especially prone to rust and corrosion from the inside out. As a general rule of thumb, most homes need repiping somewhere between 25 and 50 years after the original plumbing was installed, though water quality and pipe material both shift that window. If you’re renovating an older home, it’s worth having your plumbing assessed at the same time — updating fixtures on top of failing pipes just means redoing the work sooner than you’d like.
How Much Does Repiping Cost?
Repiping cost depends heavily on the size of your home, the pipe material you choose, and how accessible your existing pipes are. As rough benchmarks: a 1,400 sq ft house typically runs $4,000–$10,000, and a 2,000 sq ft house typically runs $4,000–$15,000. Homes with older galvanized pipes usually land at the higher end, since there’s more labor involved in removing them. The expense comes down to two things: the labor of accessing and replacing pipes throughout the whole house, and the cost of quality materials like copper or PEX. It’s a significant upfront cost, but it’s also the kind of investment that prevents years of piecemeal leak repairs and the water damage that comes with them. A licensed plumber can give you an exact quote after assessing your specific home.
Repiping Materials: PEX vs. Copper vs. Alternatives
Is PEX Really Better Than Copper?
It depends on what you’re optimizing for. PEX is more flexible and easier to install, which typically means lower labor costs, and it resists corrosion and freezing better than copper. Copper is the more traditional choice and known for its long-term durability. Between the two, PEX tends to be the more affordable, faster-to-install option, while copper is the more time-tested, premium choice. Either is a legitimate choice for a whole-house repipe.
What’s the Best Material to Repipe With?
Copper and PEX are the two most commonly used materials for whole-house repiping, and both have real advantages. The right choice depends on your budget, your home’s specific layout, and your own preference between copper’s proven longevity and PEX’s flexibility and lower installation cost.
What Are the Downsides of PEX?
PEX degrades when exposed to UV light, so it isn’t suitable for outdoor use or anywhere it will see direct sunlight. It also shouldn’t be used for hot water lines exceeding roughly 200°F, and it’s somewhat more vulnerable to damage from rodents than rigid pipe. None of these are dealbreakers for a typical indoor whole-house repipe, but they matter for specific applications.
How Long Does PEX Actually Last?
Installed underground and properly protected from UV exposure, PEX can last 50 years or more. Fittings are generally less prone to leaking than traditional copper or PVC connections when installed correctly, and with proper installation PEX can go decades without a leak. That said, PEX can become brittle over time with prolonged exposure to UV light, chemicals, or high heat, which is why proper installation and periodic inspection still matter.
Why Are Copper Pipes Less Common Now?
Copper is durable and corrosion-resistant, but it’s prone to pinhole leaks caused by chemical reactions with water over time, and it’s more expensive with more labor-intensive installation. That combination has pushed many homeowners and builders toward PEX or CPVC as more affordable, easier-to-install alternatives.
What Are the Alternatives to Copper?
PEX, PVC, and CPVC are the main alternatives. PEX is flexible and resists freezing; PVC and CPVC are rigid plastic pipes commonly used for drain and vent lines rather than pressurized supply lines. Each has tradeoffs worth discussing with your plumber based on where in the house it’s being used.
Are There Alternatives to a Full Repipe?
Yes, in some cases. Pipe relining — inserting a new lining into existing pipes to seal leaks and cracks — is one option. Installing a water filtration system can also help if the core issue is water quality rather than physical pipe failure. Neither is a substitute for a full repipe if your pipes are truly failing, but they’re worth discussing if you’re trying to avoid or delay a bigger project.
The Repiping Process
How Invasive Is Repiping?
It depends on your home’s size, plumbing layout, and the materials used. Traditional repiping involves cutting into walls, floors, and ceilings to access existing pipes, which is why the process can feel disruptive. Many plumbers, including our team, use minimally invasive techniques where possible to reduce the amount of cutting and excavation required.
How Long Does a Repipe Take?
Most whole-house repiping projects take 3 to 5 days, though a PEX-specific repipe often runs closer to 2 to 5 days since it’s generally faster to install than copper. Larger homes or more complex plumbing layouts can extend the timeline. Your plumber should give you a specific estimate once they’ve seen the scope of the job.
Does a Repipe Include the Drain Lines?
Usually, yes. Drain pipes are often the same age and material as the supply pipes, and they deteriorate on a similar timeline, so most whole-house repipes replace both to bring the entire system up to code at once rather than leaving aging drains in place.
Can You Repipe Just One Bathroom or Part of a House?
Yes — partial repiping is a real option when the problem is isolated to specific pipes or a specific area, like a single bathroom. It’s often more cost-effective than a full whole-house repipe, but it only makes sense if the rest of your plumbing is genuinely in good shape. A plumber can assess whether a partial repipe will actually solve your problem or just delay a fuller repipe later.
Can You Repipe Without Removing Drywall or Walls?
Yes, through a technique often called in-wall repiping or replumbing. Instead of tearing out entire sections of wall, the plumber accesses pipes through small holes, which is less invasive and typically less expensive than traditional methods. It doesn’t work for every home or every plumbing layout, so it’s worth discussing with your plumber whether your specific situation qualifies.
How Should I Prepare My House for Repiping?
Clear out any clutter around the areas where pipes will be accessed, and turn off the main water supply before work begins to prevent water damage during the process. If you share walls or utilities with neighbors, giving them a heads-up about possible temporary water disruption is a good idea. Beyond that, the most important preparation is choosing a reputable, experienced plumbing company.
What Should I Ask a Plumber Before Repiping?
Ask what materials they plan to use and why, what the expected timeline is, and whether there will be any disruption to your water service during the project. Get a detailed written estimate that includes all associated costs, not just the base labor and materials — this is where surprise charges tend to hide if you don’t ask upfront.
Should You Repipe?
Is It Worth It to Repipe a House?
For a home with genuinely failing pipes, yes. Repiping improves water flow and water quality, prevents the kind of leaks that cause real property damage, and can increase your home’s value. It’s a real upfront cost, but for older homes with corroded or outdated pipes, it’s usually a worthwhile long-term investment rather than an optional upgrade.
Does Repiping Actually Add Value to a Home?
Yes. Old, corroded pipes create real risk — leaks, low pressure, water damage — that buyers notice during inspection. Updated plumbing removes that risk and gives buyers confidence in the home’s systems, which is a meaningful factor if you’re planning to sell.
Does Repiping Prevent Slab Leaks?
Yes. Slab leaks happen when pipes beneath a home’s foundation start leaking, which can damage the foundation itself and cause water intrusion inside. Replacing old or damaged pipes with new, more durable ones before they fail is the most reliable way to avoid the cost and disruption of a slab leak.
Should I Repipe Before or After Remodeling?
If your pipes are old or already showing problems, repipe first — doing it after a remodel risks damaging new fixtures and finishes when the walls need to be opened up again. If your pipes are in solid condition, you have more flexibility to remodel first and repipe later if needed. A plumbing assessment before you start remodeling is the best way to know which situation you’re in.
How Long Does a Repipe Last?
A properly installed, well-maintained repipe typically lasts 20 to 50 years, depending on the material used, your water quality, and how well the system is maintained afterward. Regular professional inspections help catch small issues before they become the kind of problem that shortens that lifespan.
Warranty & Responsibility
What Warranty Comes With a Repipe?
Warranty terms vary by plumbing company. At The 5 Star Plumbing, we offer a 25-year warranty on our repiping work — if an issue arises from our workmanship, we come back and fix it at no additional cost. When comparing quotes, the warranty terms are worth weighing just as heavily as the price.
Who’s Responsible for the Water Pipe Leading Into My House?
This varies by location. In many cases, the homeowner is responsible for the pipe from the water meter to the house, while the local water authority handles the line up to the meter. Check with your local water authority or a licensed plumber to confirm how it works in your specific area before assuming either way.
Considering a Repipe?
Whether you’re dealing with recurring leaks, low pressure, or just an aging plumbing system, our licensed plumbers can assess your home and give you an honest recommendation — full repipe, partial repipe, or something short of that.
Contact The 5 Star Plumbing today for a repiping consultation across Los Angeles and San Francisco.
